// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_IMPL_H_
#define CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_IMPL_H_

#include <memory>

#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "content/browser/loader/navigation_url_loader.h"

namespace net {
struct RedirectInfo;
}

namespace content {

class AppCacheNavigationHandle;
class NavigationURLLoaderImplCore;
class NavigationData;
class ServiceWorkerNavigationHandle;
class StreamHandle;
struct GlobalRequestID;
struct ResourceResponse;
struct SSLStatus;

class NavigationURLLoaderImpl : public NavigationURLLoader {
public:
    // The caller is responsible for ensuring that |delegate| outlives the loader.
    NavigationURLLoaderImpl(BrowserContext* browser_context,
        std::unique_ptr<NavigationRequestInfo> request_info,
        std::unique_ptr<NavigationUIData> navigation_ui_data,
        ServiceWorkerNavigationHandle* service_worker_handle,
        AppCacheNavigationHandle* appcache_handle,
        NavigationURLLoaderDelegate* delegate);
    ~NavigationURLLoaderImpl() override;

    // NavigationURLLoader implementation.
    void FollowRedirect() override;
    void ProceedWithResponse() override;

private:
    friend class NavigationURLLoaderImplCore;

    // Notifies the delegate of a redirect.
    void NotifyRequestRedirected(const net::RedirectInfo& redirect_info,
        const scoped_refptr<ResourceResponse>& response);

    // Notifies the delegate that the response has started.
    void NotifyResponseStarted(const scoped_refptr<ResourceResponse>& response,
        std::unique_ptr<StreamHandle> body,
        const SSLStatus& ssl_status,
        std::unique_ptr<NavigationData> navigation_data,
        const GlobalRequestID& request_id,
        bool is_download,
        bool is_stream);

    // Notifies the delegate the request failed to return a response.
    void NotifyRequestFailed(bool in_cache, int net_error);

    // Notifies the delegate the begin navigation request was handled and a
    // potential first network request is about to be made.
    void NotifyRequestStarted(base::TimeTicks timestamp);

    NavigationURLLoaderDelegate* delegate_;

    // |core_| is deleted on the IO thread in a subsequent task when the
    // NavigationURLLoaderImpl goes out of scope.
    NavigationURLLoaderImplCore* core_;

    base::WeakPtrFactory<NavigationURLLoaderImpl> weak_factory_;

    DISALLOW_COPY_AND_ASSIGN(NavigationURLLoaderImpl);
};

} // namespace content

#endif // CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_IMPL_H_
